Troubledone, I'm sure others will be able to help you more but I will try!
My experience with my AH is that when he promises the world or has ridiculous/far fetched dreams, it usually is a sign that he has relapsed or will do soon. I'm not sure if this is a 'classic' addict behaviour but it's definitely a pattern I have noticed in him. The bigger his ego, the more active he is as an addict.
It sounds like you have tried to help her a lot, I have learnt that sometimes helping is actually stopping them from reaching their rock bottom.